Pocket-knife.



PATENTED FEB. 13, 1906.

G. SGHRADE.

POCKET KNIFE.

APPLICATION FILED JAN. 7. 1905.

w114/coach zoV UNITED sTArnsw MPnjrinrr oFFroE.

GEORGE SUHRADE, 0F VVALDEN, NENV YGRK.

POCKET-KNIFE.

Specification of Letters Patent.

Patented Feb. 13, 1906.

Application filed January '7, 1905. Serial No. 239,992.

T0 aZZ whom it 11mg/ concern:

Be it known that I, GEORGE SCHRADE, a citizen of the United States,residing at Walden, in the county of Orange and State of New York, havemade certain new and useful yImprovements in Pocket-Knives, of which thefollowing is as ecication.

My invention re ates to pocket-knives in which provision is made for theautomatic opening of the blade when released'and for locking the bladeboth when open and when closed.

The particular construction of knife for which my improvements aredesigned is described in Letters Patent of the United curing the saidspring. Fig. 3 is a longitudinal sectional view taken in the plane inwhich the blade swings. Fig. 4 is a transverse longitudinal section.Fig. 5 is a sectional vView showing the push-button in its relation withthe holdingin and the safety-slide. Fig. 6 is a detache enlarged edgeview of the covering plate or Washer used to secure the spring carryingthe locking in. Fig. 7 is a detached enlarged view o the safety-slide.Fig. 8 is an enlarged sectional view of the bladespring.

to each other by rivets which pass through them., The sides are usuallyformed of thin sheets of brass and the back of iron. The mountings orcovers B and B may be of pearl, bone, wood, or anyother suitablematerial. They are riveted or otherwise secured to the linings.

The blades` are re resented by C C and have Shanks c c. T 1e blades arepivotally secured in position between the sides of the casing by ahollow pivot D, riveted to the sides and passin through a hole in theshank. Through the hoow pivot D passes the stem s of apush-button P. Theshank c of each blade 1s provided with recesses c and c2, lo-

cated upon opposite sides of the pivot D and adapted to receive a stude, the recess 'c' to hold the blade open and the other, c2, to hold itclosed. The recesses c and c2 are here shown as circular, which shape I`refer; but it is obvious that they may be ova or any desired shape incross-section.

Thedevice for releasing and holding the knife-blades consists of a plateor bar spring E, secured at one of its ends to the lining of the casing,as hereinafter described, and provided near its opposite end with a studc, adapted tov project through the-lining of the casing and into one orthe other of the recesses c or c2 when the blade is closed or open. Thespring E lies on the lining, and its free end projects past the hollowpivot D, so that it formsa rest for the stem s of the push-button P. Thestem s is slightly headed to prevent its dropping out of the hollowrivet D. The covering plate or washer w covers the end of theplate-spring E. The rivet r asses through the washer, the spring, andthe ining A of the knife, riveting the washer to the lining, and therebysecuring the spring in position. The covering plate or washer -w eX-tends pastthe end of the s ring E and is bent down at its end, so it wilnot press on the spring E, but rest onthe lining at y. I make thiswasher o r plate slightly bowed in its length1 as will be seen in Fig.6, by which construction the washer touches the spring E at the end,where it is turned slightly upward,

gidity which would result from its being riveted to the lining in theusual way. By my improved construction a certain amount of lateral layis allowed the spring E, which secures t e perfect operation of the stude in conjunction with the holes c and c2 of the blade-shank. Afterlcareful experiments I have found this improved construction in.- suresthe proper working of the stud e in combination with the holes in theshank of the knife-blade. I preferably form the studs e e conical, sothey will t snugly in the holes. When the spring E is rigidly riveted tothe lining of the knife, the end pressedl down by the push-buttondescribes a circle and causes the stud e to bind in the holes c and c2.

The actuating-spring F. is arranged to IOO IIO

throw the blades when released from a closed .to an open position.v Onthe inner face of the back a areforrned two projections b and b',

on which the actuating-spring will rest when secured in position by therivet f. The free ends of the sprin F bear against the under sides ofthe shan y(s c c, respectively, of the blade and are slightly turneddownward at e Ain order to more fully ride on the shank. The spring F isslightly bent at the center land firmly held in position by the rivet f,passing 'through the linings AA. Where the knife- I room for thepush-button to move in. The

face 'of the push-button should be iiush with the outer surface of theknife-cover when the knife-blade is locked and housed in the casing.Heretofore the face of the push-button.

has been smooth, and in conse uence the thumb nail in practice would sip over it without releasing the blade. In order to obviate thisdifculty, I provide the face of the push-button with transverse cuts orcorrugations in which the thumb-nail will engage. When pressed upon bythe finger, the stem s of the push-button will throw the end of the sring E away from the side of the'lining, and tiiereby withdraw the stude from the recess in the shank of the blade. v v

L is the slide of the safety-lock and lies in a recess n, made in thecover to receive it. I prefer to Vmake the slide L bowed a little, as

v shown in Fig. 7, lso it will press on the lining and the cover Bsufliciently to hold it in position. The rivet 1"', whichfastens thellning to the covering, passes through the oblong hole i in the slide.The end of theslide L next to the push-button is formed into a fork m,so a prong will pass each side of the shank s and under the push-buttonI?, performing the services of a detent.

The finger-piece k is formed on the slide L and projects through thehole l, cut in the cover B.

When the slide L is pushed forward so the vters Patent, is-

When it is desired, the lock may be used to lock the blade o en.

Having thus escribed my invention, what I claim as new, and desire'tosecure by Let-` ,1. In a pocket-knife provided with automaticblade-opening mechanism operated by a push-button, a safety lockingdevice comrlsing a forked detent housed between the lining and coveringof the 'knife `and adapted to embrace the Vshank of the push-buttonunder its head,.substantially as shown and described. 2. In apocketknife,.the blades of which are automatically o ened, substantiallyas described, a sliding p ate housed between the lining and cover andadapted to engage the push-button land prevent its operation,substantially as shown and described.

` 3. In a pocket-knife, the blades ofwhich are automatically opened,substantially as described,` by a spring carrying a stud adapted tosocket in holes in the shank of the blade, means for securing saidstud-carrying spring to liningof the knife, comprising a washer formedto rest at end on the lining, and at the other end on the spring and arivet securing said washer to the ining, said rivet passing through ahole in the spring greater in diameter than the rivet, substantially asshown and described.

4. In a pocket-knife, the bladeof which is automatically opened,substantially as described, a'spring carrying a stud adapted to socketin holes in the shank of the blade, means for .securing saidstud-carrying spring to the lining of the knife, whereby the s ring isallowed a lateral play substantial yas shown and described.

5. In a pocket-knife, the blades ofwhich are automatically opened,substantiallyy as described, a blade-opening spring secured at thecenter by a rivet and resting on contiguous projections formed on theinterior of the knife-back.

GEORGE SCHRADE. Witnesses:

WILLIAM FREEMAN, B. C. STICKNEY.

IOO

